Ontario Operator-in-Training (OIT) Practice Exam

What is the primary purpose of valves in water systems?

1. To increase fluid temperature

2. To stop or control fluid flow

3. To measure fluid quality

4. To filter sediments from water

The correct answer is: To stop or control fluid flow

The primary purpose of valves in water systems is to stop or control fluid flow. Valves play a crucial role in regulating the movement of water through pipes and other infrastructure. By opening or closing, they can either allow water to flow freely or stop it completely, making them essential for maintaining operational efficiency and ensuring safety within the system. Valves also enable operators to direct water to different parts of a water distribution network as needed, facilitating maintenance and repair activities. This helps prevent leaks and minimizes the risk of contamination by allowing for sections of piping to be isolated. Ultimately, the effective control of fluid flow contributes to the overall reliability and functionality of a water system. While other functions such as measuring fluid quality or filtering sediments are important components of water treatment, they are not the primary function of valves within a water system. Valves specifically focus on the regulation of flow rather than altering the water's physical properties or characteristics.